Some fixes

tiktok2bsky.py

@@ -69,7 +69,7 @@ SCRAPE_VIDEO_LIMIT      = 30
 VIDEO_MAX_AGE_DAYS      = 3
 
 VIDEO_MAX_DURATION_S    = 179       # Bluesky hard limit is 180s
-VIDEO_MAX_SIZE_BYTES    = 45 * 1024 * 1024   # 45 MB
+VIDEO_MAX_SIZE_BYTES    = 20 * 1024 * 1024   # 20 MB
 
 # Bluesky login retry config
 BSKY_LOGIN_MAX_RETRIES  = 4
@@ -546,38 +546,37 @@ def compress_video(input_path: str, output_path: str,
 
         if duration <= 0:
             logging.error(
-                f"❌ compress_video: ffprobe returned duration={duration} "
-                f"— file is not a valid video: {input_path} "
-                f"({os.path.getsize(input_path)} bytes)"
+                f"❌ compress_video: invalid duration={duration} "
+                f"for {input_path} ({os.path.getsize(input_path)} bytes)"
             )
             return False
 
         trim_to = min(duration, max_duration)
 
-        target_bits = max_size_bytes * 8 * 0.90
-        target_kbps = int(target_bits / trim_to / 1000)
-        video_kbps  = max(200, target_kbps - 128)
+        # Target 85% of the size budget to leave headroom for container overhead
+        target_bits  = max_size_bytes * 8 * 0.85
+        total_kbps   = int(target_bits / trim_to / 1000)
+        audio_kbps   = 96
+        video_kbps   = max(200, total_kbps - audio_kbps)
 
         logging.info(
             f"🎬 Compressing: duration={duration:.1f}s → trim={trim_to:.1f}s, "
-            f"video_bitrate={video_kbps}k"
+            f"video_bitrate={video_kbps}k (target ≤ {max_size_bytes // 1024 // 1024}MB)"
         )
 
         cmd = [
             "ffmpeg", "-y",
             "-i", input_path,
             "-t", str(trim_to),
-            # Scale to fit within 1280×720, then pad to even dimensions
-            # The pad filter is required because libx264 needs width/height
-            # divisible by 2. Portrait TikTok videos (9:16) would otherwise
-            # produce odd widths like 405px and crash the encoder.
-            "-vf", "scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,pad=ceil(iw/2)*2:ceil(ih/2)*2",
+            # Scale to 720p max, pad to even dimensions (required by libx264)
+            "-vf", "scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,"
+                   "pad=ceil(iw/2)*2:ceil(ih/2)*2",
             "-c:v", "libx264",
             "-b:v", f"{video_kbps}k",
-            "-maxrate", f"{video_kbps * 2}k",
-            "-bufsize", f"{video_kbps * 4}k",
+            "-maxrate", f"{video_kbps}k",       # hard ceiling — no burst above target
+            "-bufsize", f"{video_kbps * 2}k",
             "-c:a", "aac",
-            "-b:a", "128k",
+            "-b:a", f"{audio_kbps}k",
             "-movflags", "+faststart",
             "-pix_fmt", "yuv420p",
             output_path,
@@ -589,6 +588,16 @@ def compress_video(input_path: str, output_path: str,
             return False
 
         final_size = os.path.getsize(output_path)
+
+        # Reject if still over the hard limit
+        if final_size > max_size_bytes:
+            logging.error(
+                f"❌ Compressed file still too large: "
+                f"{final_size / 1024 / 1024:.1f} MB > "
+                f"{max_size_bytes / 1024 / 1024:.0f} MB limit. Skipping."
+            )
+            return False
+
         logging.info(
             f"✅ Compressed video: {final_size / 1024 / 1024:.1f} MB → {output_path}"
         )
@@ -598,7 +607,6 @@ def compress_video(input_path: str, output_path: str,
         logging.error(f"❌ compress_video error: {e}")
         return False
 
-
 def download_video(url: str, output_path: str,
                    cookies: list = None) -> bool:
     """